Navigation device used for a route search
DCFirst Claim
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1. A navigation device, comprising:
- a storage unit configured to store link data for links constituting routes on a map, where at least one link has plural lanes including ones of a left-turn lane, a straight-through lane and a right-turn lane, and where the link data;
identifies each link using an identifier, associates each respective lane with the identifier of the at least one link to which it belongs, and stores respective costs of the respective lanes; and
a route search unit adapted to search for a route having a lowest total cost to a destination, using said link data, including using the respective costs of the respective lanes.
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Abstract
Route search is performed considering the fact that traffic conditions differ according to lane even for the same road. A navigation device performs route search, using link costs (link travel times) classified by lane. For example, the navigation device searches for a route having the lowest total cost to the destination, using link data that determine cost for each lane of a component link of a road on a map. A cost of a lane on which a vehicle runs to move to a next link, being the cost of any lane of the link, is used as a cost of a link on a route.
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Citations
8 Claims
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1. A navigation device, comprising:
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a storage unit configured to store link data for links constituting routes on a map, where at least one link has plural lanes including ones of a left-turn lane, a straight-through lane and a right-turn lane, and where the link data;
identifies each link using an identifier, associates each respective lane with the identifier of the at least one link to which it belongs, and stores respective costs of the respective lanes; anda route search unit adapted to search for a route having a lowest total cost to a destination, using said link data, including using the respective costs of the respective lanes. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A navigation device comprising:
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a storage unit configured to store link data for links constituting routes on a map, where at least one link has plural lanes including ones of a left-turn lane, a straight-through lane and a right-turn lane, and where the link data;
identifies each link using an identifier, associates each respective lane with the identifier of the at least one link to which it belongs, and stores respective travel times of the respective lanes;a route search unit adapted to search for a route to a destination; and a travel time calculation unit adapted to calculate a total travel time to said destination, by adding travel time of respective links constituting a route to said destination;
whereinsaid travel time calculation unit uses, as a travel time of a link on a route, a travel time of a lane on which a vehicle runs to move to a next link.
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8. A navigation device, comprising:
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a storage unit configured to store link data for links constituting routes on a map, where at least one link has plural lanes including ones of a left-turn lane, a straight-through lane and a right-turn lane, and where the link data;
identifies each link using an identifier, associates each respective lane with the identifier of the at least one link to which it belongs, and stores respective costs of all respective lanes of the routes; anda route search unit adapted to search for a route having a lowest total cost to a destination, using said link data, including using the respective costs of the respective lanes.
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Specification